<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>避开炸弹</title>
</head>
<body>
    <script>
        var sum=0;
        var arr=[1,2,'炸弹',3,4,'炸弹',5];
        for(var i=1;i<arr.length;i++){
            if(arr[i]!='炸弹'){
                sum+=arr[i];
            }
        }
        alert(sum);
    </script>
</body>
</html>